5WA 121 251 D
Radiator – 5WA 121 251 D
Radiator for the VW Group MQB Evo (Golf 8 / A3 8Y) platform, OE number 5WA 121 251 D. Main group 121 sub-group 251 identifies this as a radiator. Revision index D. Cooling capacity and mounting differ between engine variants on the same platform — confirm against your engine code before ordering.
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Technical specifications
| Part Number | 5WA 121 251 D |
| SKU | AUD-5WA121251D |
| Brand | |
| Category | Radiators |
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3–5 business days. Free on orders over $150.
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Order before 2 PM for next business day delivery.
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Customer reviews
Verified feedback from Audi owners and independent workshops.
3.8
4 reviews
Ingrid Rossi
August 16, 2026
Better core than the original
My A4 B8 needed this doing at 61k miles. The end tanks are properly crimped with clean seams all the way round. Front end off, old one out, this one in over a long Saturday. Result is the coolant level has not moved in four months. Would order again without hesitation.
Kwame Rossi
May 25, 2026
Perfect fit, no modification
Fitted to my 2013 A4 B8.5. I bled it through the proper procedure and it has held level ever since. The plastic feels substantial rather than the brittle stuff that cracks at the neck. Result is intake temps dropped noticeably on a long motorway pull.
Patrick Vogel
April 23, 2026
Temps back to normal
Went on my A6 C8 2.0 TDI at 53k miles. All the mounting points and hose stubs lined up without any persuasion. The plastic feels substantial rather than the brittle stuff that cracks at the neck. Result is the coolant level has not moved in four months.
Martin Rahman
November 11, 2025
Good rad, mounting tabs tight
Bought for a 2017 Q7 4M. Front end off, old one out, this one in over a long Saturday. The plastic feels substantial rather than the brittle stuff that cracks at the neck. On balance no more creeping temperature when towing. Fine for the money, with that one caveat.